* control_flow_graph: Improve divergence handling
* recompiler: Simplify optimization passes
Removes a redudant constant propagation and cleans up the passes a little
* ir_passes: Add new readlane elimination pass
The algorithm has grown complex enough where it deserves its own pass. The old implementation could only handle a single phi level properly,
however this one should be able to eliminate vast majority of lane cases remaining. It first performs a traversal of the phi tree to ensure
that all phi sources can be rewritten into an expected value and then performs elimintation by recursively duplicating the phi nodes at each step,
in order to preserve control flow.
* clang format
* control_flow_graph: Remove debug code
